BACKS, MANGERS, STANCHIONS, ETC. 21 



must be strongly made, and be set at the bottom, on a 

 level with the floor of the pen. A pig of one hundred 



Fig. 16. THOUGH INSIDE OF PEN. 



pounds weight cannot stand in the trough; the latter can 

 be cleaned out and the feed can be put into it from the 



Fig. 17. GOOD FORM OF PIG TROUGH. 



outside. A good form of trough is shown in figure 17. 



