Too many dogs in the house

My MIL's dog passed a few weeks ago and her birthday is 7/5 so SIL and hubby decided she needed a new puppy. He's been looking online and in shelters and found a weiner and maybe basset mix who is SO precious. He now lives with us after a short jaunt to Southlake with SIL's wallet. The brings the total to 2 6 month olds and 1 4 yr old. No one should have to live with 2 puppies in a house this small. He is a looker, though. He is incredibly sweet and gentle and has the unfortunate luck to be named Sonic. We were going to rename him, but he answers to Sonic and I feel bad moving him 2 times in 3 weeks and changing his name. If I had a bigger house, we would have more dogs, the rescue group had a pair of pure Beagle siblings that were found in their owners house, but owner had been dead 2 weeks before the relatives found him and them. They were beautiful Beagles and I'm sure they are going to be separated and that is going to break their hearts :( But anyway, we now have Shortstop, Sonic, and Maris, and when mom and co go to Yellowstone next week we will add Stormy, Dirk, and Hunter to the mix. That is a lot of dogs and only two of us.