Hi all was just wondering what size rats i should be feeding my Murray Darling he was on adult mice and small rats but when i went to the shop i got him from to get more feed for him they told me to upsize his feed he is 16 months old and is about 3 feet long, they gave me adult rats they seem to be way to big for him, when i gave him his first one i thawed it out for to long in hot water so when he was trying to eat it its guts come out everywhere so he regurgitated it, ive tried him again yesterday but isnt interested. his head is about nearly the size of a 20c coin and his neck about a 10c coin his body about a 50c coin. thanks