
I would prefer that he is fed a set amount three times a day. Check the bag of the food he is on and it should say how much to give him either by his weight or by the weight he will be as an adult although I can imagine this may be a bit less easy with a JRT as you don't quite know exactly how big he will be. I take it that the food it one for puppies? Just divide the total amount by the three meals. Put the food down and allow a reasonable time for him to eat it, my five month old pup doesn't always eat her breakfast in one go and comes back to it about ten or fifteen minutes later for instance. If he leaves some, after encouraging him to eat, take it away and give slightly less next time. If that's all polished off then slightly more next time. You are right that a regular meal time will mean a more regular toilet habit and therefore easier to toilet train. When I first got our latest pup, I made notes of when she was fed and when and what she toileted, a bit pedantic maybe, but it gave me a clear understanding of her toileting patterns and when to take her out and expect something to happen fairly quickly. I'm sure this speeded up the toilet training as she realised quickly why she was being taken outside and what was expected of her. Trouble is now when I let her out she expects me to come with her. She seems to like having an audience when she 'goes'. Not so great now it's raining all the time!