I have been showing, working and breeding Jack Russells for more than 10 years now. These days I am down to four terriers, trying to keep it manageable. I have seen them do just fine with goats if raised right. Chickens are never really "safe" with terriers. In addition, we have three rescued French Bulldogs. A cockatiel, three misfit parakeets that I inherited from working at a vet clinic. 12 Ameracauna chicks...that number will be drastically reduced as soon as we can tell the sex. We only plan on keeping four. And a partridge in a pear tree.