Hi, I'm just looking for some help to get my 6 dogs fixed

Hello there! I have 6 beautiful dogs, all boxers. I have a 3yr old and a 2-1/2 yr old, and they had a litter of Puppies! I kept all 4 of them, they are now 8 months old and I need help getting them fixed! Anything would help out! Thank you! :)