Sorry but you can't take her/him on a 8 mile walk. They are not strong and able to walk that distance. This is not stopping you in the future when your puppy is older. I would recommend around 1 years and over.
one month
You should take your puppy out at least every hour, if it's a male puppy they need to go more often that a female puppy or so seems anyway.
I am assuming you mean " give a 9 month old puppy his first shots"Well , puppy should have had his first shot at 3 month, depending on the breed, some very small breeds get their shots at 4 month. But better late then never. Take this puppy to the vets as soon as possible, the vet will advise you what is needed and how to proceed.
There is a possibility that the puppy may pass away (die of a horrible and painful death, thanks to whoever did not take care of the puppy properly)
There called worms they can be uncomfortable for puppy, so take puppy to local vet to get weighed and they will then give your puppy worming tablets your puppy will have to take these regularly maybe once a month till a certain age. Vets do package that will send out tablets when they needed to be taking.
take it to the vet, that's not good that it's not healing you go to a veterinarian...
You take it to a vet, it will need attention that you can't give it
They should not leave there mother until they are 6 months.
You definitely need to talk to your Vet. I find it difficult to believe a Vet would prescribe Rimadyl for a 3-month old puppy, and I presume you care enough about your puppy to treat it ONLY with medications OK'd by your Vet.
A 4-month old puppy doesn't know what to eat. It's still learning that...they think grass is food, until they throw up...OR THEIR OWNER STOPS THEM!!! (take that as a hint)
Before you start to run with a puppy they should be at least two years old.
uh dude take the poor guy to the vet!!