The feeding trough has a range of about 10 stone foundation. My juvenile starved because it was agro and walking outside of range,make sure all juvenile are close enough

Remember only babys will eat out of this thing when there 10+ matured (I think)

If you are pro or something than tame a giga or charcha and kill a ton of stuff for meat , or tame a theri or brontosaurus and get a ton of berry's and put it in this thing. You will gradually do it a few times around 5 to 10 days - ark days and you will have food set for life for your dinos and you