I hate finding that out the hard way...or like when a dog has rolled in a cow pie and you don't figure it out until they're up on the couch next to you, or worse, in bed.
She seriously did have a pinecone stuck in her pants; it was about the size of an oblong baseball. We only noticed because she tried to sit then jump right back up, looking at her pants like, "What is going on there?!"
Poor doggy! It can't have been comfortable (or pleasant!)
Talking of cow pies... the new gate had a large puddle under it, which just wouldn't drain. Well, we had a dry summer and it did eventually evaporate. The dogs got out under it one day, which I only found out by accident (a visitor had left, forgotten something and came back, while I was passing it to her Suzi came trotting down the road). Molly followed soon after - and my little grey and white fluffball was green. Fresh cow pie all over her. She knew she'd done wrong as soon as she saw me, and tried to rub it off on the grass. That didn't work, and she got a bath for her troubles. Molly hates baths.
(I ended up wiring plastic garden edging to the bottom of the gate like a mudflap. Last week I finally had the driveway graded and regravelled, so no more mudflap needed. And NO room for wriggly doggy escapes.)