delivered the opinion of the court.
This is an action to recover damages for the trespass of defendant’s sheep upon plaintiff’s uninclosed grazing lands in Grant County in the year 1902. Plaintiff had judgment 'for $525, and defendant appeals. It is unnecessary to set out the pleadings or the facts in detail. Two questions are presented for decision : (1) Whether an action can be maintained for the depasturing of uninclosed lands in Grant County by sheep under the charge of a herder, without alleging and proving either that the premises were inclosed by lawful fences, or that the sheep were knowingly and wilfully driven and confined upon theland ; and (2) error in the admission and rejection of testimony.
1. At common law an owner of domestic animals was required to confine them on his own land, and was liable for any injury doile by them to the uninclosed land of another: 2 Waterman; Trespass, § 858; 2 Am. & Eng. Enc. Law, (2 ed.) 351. This rule has in part been abrogated in this State by the several fence laws. In 1870 the legislature passed an act requiring all fields or inclosures to be inclosed by a certain character of fence, and providing that, if any stock broke into such inclosure, the owner should be liable in damages therefor, but excluding the counties of Umatilla, Baker, and Union from its operation : Laws 1870, p. 20. In Campbell v. Bridwell, 5 Or. 311, it was held that in the portion of the State where this law applied an action could not be maintained for the trespass of domestic animals without showing an inclosure built in substantial conformity to the statute, and this rule was reaffirmed in Walker v. Bloomingcamp, 34 Or. 391 (43 Pac. 175, 56 Pac. 809), and Fry v. Hubner, 35 Or. 184 *107(57 Pac. 420). In 1872 the legislature so amended the act of 1870 as to include Umatilla County only-(Laws 1872, p. 15), and at the same session enacted a law “in relation to trespass by cattle, and regulating fences in the counties of Umatilla and Wasco”: Laws 1872, p. 123. By section 1 of this latter act it is provided that no action shall be maintained for damages done by certain enumerated animals, .not including sheep, unless the person seeking such damages shall allege and prove upon the trial that the premises at the time of the commission of the injury were inclosed with a lawful fence. Section 2 defines what shall constitute a lawful fence within the meaning of the law. Section 3 provides for the seizure of the trespassing stock as security for the payment of the damages done by them, and section 4 that the act shall apply only to the counties of Umatilla and Wasco. Section 2 was amended in 1874 (Laws 1874, p.-65), and as so amended, published in Hill’s Compilation of the Laws of Oregon as sections 3452-3455. In French v. Cresswell, 13 Or. 418 (11 Pac. 62), Bileu v. Paisley, 18 Or. 47 (21 Pac. 934, 4 L. R. A. 840), and Strickland v. Geide, 31 Or. 373 (49 Pac. 982), it was decided that in counties to which the act of 1873 applied it is not necessary to fence against sheep, because they were not named in the act; that as to them the common-law rule prevails, and an action can be maintained for trespass on uninclosed lands. This has been the law ever since French v. Cresswell was decided, and has been the basis for subsequent legislation. We therefore do not feel like disturbing it, whatever views we might entertain if the question were one of first impression. In 1901 the legislature extended, or endeavored to extend, the act of 1872 so as to include the counties east of the Cascade Mountains, naming them, by amending section 3455 of Hill’s, Ann. Laws,* *108being section 4 of the law of 1872: Laws 1901, p. 128. If the latter act is valid, the doctrine of French v. Cresswell and the subsequent cases based thereon is applicable to an action for the trespass of sheep in Grant County, and there was no error in the ruling of the court upon that point.
Whether the subject-matter of the amendatory act of 1901 is so far germane to that of the one sought to be amended that it could have been included in the original without violating the provisions of the constitution requiring the subject of an act to be expressed in the title is a question we do not decide, but it is worthy of consideration. See Ex parte Howe, 26 Or. 181 (37 Pac. 586).
2. One Deardorf was called as a witness for the plaintiff, and testified that he was acquainted with the premises upon which the trespass is alleged to have been committed, and with the character of the grasses growing thereon. Thereupon counsel for the plaintiff propounded -to him the following question: “Do you know how much that land was damaged by reason of the sheep trampling it up and eating it down last year ?” to which defendant’s counsel objected, on the ground that the question was incompetent, and called for the opinion of the witness. The objection was overruled, and the witness answered: “Well, it would be owing to the way — . If I owned it, I would not have had them on there for seven or eight hundred dollars; and I expect it damaged them the same as it would me. If it was my land I would not have had them on there for seven or eight hundred dollars.” A motion to strike out this testimony was overruled. It has often been held that in an action to recover damages a witness may state the facts upon which the damages are predicated, and in a proper case, if qualified, may give his opinion upon a question of value, when material; but he cannot express an opinion as to the amount of damages sustained by the *109plaintiff, because that is exclusively within the province of the jury, under the instruction of the court: Burton v. Severence, 22 Or. 91 (29 Pac. 200); Chan Sing v. Portland, 37 Or. 68 (60 Pac. 718, 15 Am. Neg. Rep. 1); United States v. McCann, 40 Or. 13 (66 Pac. 274); Ruckman v. Imbler Lum. Co. 42 Or. 231 (70 Pac. 811). The principle upon which this doctrine is founded, and the reasons for it, are set out in the opinions referred to, and need not be again stated. The testimony of Deardorf was in violation of this rule, and was incompetent.
3. The measure of damages was the reasonable value to the plaintiff of the grass or pasturage eaten or destroyed by defendant’s sheep, together with the injury, if any, to the freehold. It would have been competent for a qualified witness to give his opinion as to the value of the grass or pasturage eaten or destroyed (Woodbeck v. Wilders, 18 Cal. 131; Lommeland v. St. Paul, M. & M. Ry. Co. 35 Minn. 412 (29 N. W. 119), but not as to what he might consider the amount in which plaintiff was damaged, for that was the ultimate fact to be determined by the jury. k
4. It was also competent for the defendant to show, as he offered to do, that the plaintiff and other parties had cattle grazing on the same land with his sheep during the time of the alleged trespass, and that a part of the injury complained of was caused by such cattle. He is liable only for the mischief done by his sheep, and not for that done by animals belonging to other parties: 2 Waterman, Trespass, § 871; Dooley v. Seventeen Thousand Five Hundred Head of Sheep, (Cal.) 35 Pac. 1011.
The judgment is reversed, and a new trial ordered.
Reversed.
Note. — Now Section 4344, B. & C. Comp.