Q. My 3 year old cattle dog has a yellow brown fluid coming from is anus he is not well and it really smells .I wormed him on Friday
A. It could be that he is suffering from gastroenteritis, he might also be experiencing some abdominal pain. I don' t think it is related to the worming, unless he had lots of worms prior to the medicine administration. I would recommend that you have him checked over. If he is still reasonably bright and eating and drinking, you can feed him a lighter diet of chicken and rice until you get him to see a vet. Remember diarrhoea can pose a serious risk if it's frequent or if it contains blood, and will need immediate attention.