Diy T Shirt Dog After Spaying . They sent him home with a doggy shirt that looks like a onesie for babies. For male dogs, simply tuck the straps for the hind legs under the shirt, and you won't have to take the shirt off when he needs to go number 1. The Best Alternative To The Dog Cone After Spay/Neuter Dog spay, Dog from www.pinterest.com Hind legs in the armholes and tail through the 'head'. The diy site instructables has a complete tutorial on how to make a jacket for your pet. First, slide the dog’s remaining leg through the leg hole on the corresponding side, pull the diaper waist band over the dog’s head.