Of course Baker's going to agree when he asks that, barking excitedly and immediately trying to jump down from the witcher's arms, probably to set off to find Pig without the two considerably slower men. Whether the Growlithe understands the words or just the tone, Childermass still isn't entirely sure, but he's beginning to suspect the former. Pokemon are oddly intelligent... and in this very particular case, that makes it all the more annoying.

How is he supposed to argue with a puppy?

"Unless you've managed to pull a second horse out of nowhere, you're still short one for anyone except you to go riding at all," Childermass continues to be disagreeable on the matter.