Hi there.. I have a 13 yr old Collie (blue merle) Generally his health is ok and in himself he is as well as ever, however over the last few weeks he had been suffering from diarrhea. I changed his food from Wainwrights dry to chappy wet to see if it was his diet but made no difference, so last sat i started him on rice and chicken, his no.2s were almost back to normal, so yesterday i started to re-introduce the chappy again (small amounts) but once again today the diarrhea is back. Any advice on what to feed Merlin would be very welcome. Thanks in advance. Dave.