Give them some time - it IS a big adjustment, but as long as you keep paying attention to the older dog, letting him know you still love him, and supervise them carefully for a few days, I bet they will work things out. Like any "parent" bringing home a new "sibling" there is bound to be a period of adjustment! Does Teckel have his own toys that he can keep seperate from the baby? Keep reassuring him that you still love him!

Welcome to Pet Talk. What breed of dogs are each of them?