Thanks
everyone for all the information, tips and suggestions! I've learned things I never even knew could cause issues, my head is spinning haha. I'm going to keep reading through the other threads and articles so I can learn as much as possible.
I've only recently managed to get Monty on to kibble (vet preferred him off his soft food to help his teeth etc) and he has been sooooo fussy. I was close to giving up again as I couldn't afford to keeping buying food he wouldn't eat. I went through so many types with my vet before Monty finally decided to eat one. Now I've had to stop giving him that one due to the cat incidents causing me to really lose trust in the brand.
I've tried Monty on quite a few small bags of kibble from different companies the past few days and he just wont touch them....except this Lilys kitchen one....which he actually cries for

. Typical that it was one of the most expensive lol.
I've just looked and they only do either grain-free or using 'ancient' grains which they list as spelt, rye and amaranth.... I'm just very nervous about causing any health issues as he has been through enough and could really do with a break.
Thank you Ann and Calliesmom, that's made me feel a little easier about feeding him this for now. It seems to be agreeing with him so I'll keep him on the packet while I shop around and see if I can find something else he will eat. I've had some great suggestions so it will give me time while I see if I can get any of them where I live (if he'll eat them). If it's safer to go with grains then I might try the Lilys Kitchen 'ancient grain' version for now and see if he likes it. It looks like that version has even less Pea content than what is in this one so may be a good stop gap until I research if 'ancient grains' is just another marketing gimmick or actually good for them. As suggested I think it will be a good idea to find a few healthy brands that he will eat so that I can rotate once in a while and have back-ups.
It does make you crazy be ause I am not a scientist
I know exactly how you feel, wow I never knew buying food had so many complexities haha. I knew to look for good quality mead content but I didn't know they actually added so many things that are not good for our pups.