We have 3 retired greyhounds, they are lovely and suit us.
1 bitch (who rules) and 2 dogs, (1 giddy, 1 placid). 2 are 5 years old and a 4 year old.
We have room for another, and I would love another, but at times I will have to walk them alone. 3 isn't a problem, so I doubt 4 would be.
New dog is very placid, so I might not even have to mention him to DH. 
Thoughts please, am I turning into mad dog lady?