I was online and they said that some worms that a dog has can live in the dirt outside and reinfect your dog are there any kinds of yard treatments I can use for that? I mean I think it would be useless to treat my dog for his problem being that he is an outside dog and then he gets reinfected and I’ll be left with the same problem as before.

Can a dog be vaccinated more than once with the same vaccination?
Can they be de-wormed more then once?
And is there a certain age where a dog can’t be spayed/neutered anymore?
Thanks

My little brother has been feeding the dog regular human food and he makes this growling noise at night like he has tummy ache or something. I’ve only had the dog for a little over a month and its a miniature schnauzer…