Hi there, everything will be ok.
1. Look for a mobile groomer, they will come to you. Young pups do not need to be fully vaccinated bc they do not have other dogs in the grooming van @ the same time.
2. Get your babies shaved down. Mats to the skin needs to be shaved off. It's ok, their hair will grow out nicely & you can put cute clothes on them to keep them warm.
3. Get a good dog conditioner & condition after shampooing. Use a lot of it & rinse very well.
4. Slicker brushes hurt, try running it up & down your arm, it will leave scratch marks. Invest in a pin brush & comb w/ fine & wide sides. I sell Madan pin brushes, they do not have those little balls @ the end. So the pins will penetrate through the mats & tangles & it can be brushed out.
Message me if you need help w/anything, I'll be happy to help.