My dog is naturally slim but has slipped into underweight and bony territory recently.
The nurse at the vets agrees I need to fatten him up but in the past he has had a sensitive stomach if I overfeed.
I feel very guilty that he has ended up this way.
Any tips on fatty, proteiny extras I could give him on top of his normal food (good quality dry and still on puppy food as he is 10 months).