[QUOTE=tinyrider;8259065]
But now I’m not sure what to tell my trainer when she inevitably asks why we are not trailer pooling. Should I be honest, or is a little white lie better in this situation (eg, I just decided my pony would be more comfortable in his own trailer)?[/QUOTE]
Yes, you should be honest. That’s not snarky (at least on your end). Chances are that trainer didn’t imagine the Use Fee thing, either. Don’t ask the trainer to do anything about it or even to have an opinion. Just let her know what her other client offered and that you declined and leave it at that. The wheels will turn in her head as they will. Maybe she’ll have a word with that client.
ETA: If you tell a white lie about why you declined, you are effectively protecting Use Fee Girl from some consequences (her trainer perhaps thinking she’s a jerk)… of her treating you badly. Why would you do that? Don’t make it happen, but don’t protect her either, she chose her course of action.