dogs can do combat too...

So, im one of these minecraft people, who like to get a bunch of dogs, and after you have  10 or 15, you unstoppable agents any mob and dont have to lay a hit. i think dogs should be nerfedor have different tars, also your able to protect your horse, he cant even do anythiong, so what about dog armor or something like that, also like players, maby dogs can take food while there being attacked!