I just picked one up from petsmart called the Easy rider. Ruby seems to not mind it. Started her on it at 4 months. Make sure you get the extra piece that is sold separately the makes it longer for the dog to be able to move around a little in the back seat.
I got Ruby a small since she is on the small end at 25 lbs at 5 months so you would probably need a medium
I was just wondering if RubyRoo could tell me the name of the piece that is sold separately for the easy rider that makes it longer? I have been trying to search for it but have had no luck. I think it would really help our seatbelt situation.
I found it next to the seatbelt harnesses at Petsmart. I think it is made by easy rider. It is a tether and just hooks around the seatbelt. I just checked Petsmart online and didn't see it so may only be in stores.