Tucker, a miniature goldendoodle with an incredibly sweet disposition [1], simply cannot get enough of his new human sibling who arrived [2] in January. In fact, he is so stinkin' eager to play with the baby, he's been helping his mom and dad keep tabs on his or her stuff [3] the best way he knows how: by getting into absolutely everything. Thankfully, Tucker's parents have caught some of these sweet moments on video — from him trying out the baby's toys to knocking over all of the clean bottle parts — and we can't keep it together. Scroll ahead to get a look at Tucker's most endearing moments so far.