Run the foot under cold water, see if you can get the toe straight, or looking normal if you get what i mean, apply some bone radiol (bone embrocation) to the toe with a toothbrush, place some cotton wool between the broken toe and the good ones, strap together with vet wrap, give a pain killer or anti inflammatory and rest the dog up,... broken toes are a pain in any dog but it doesn't stop them carrying on a normal life after wards. some might do it differently, but it works for me and mine...