Maybe it's just me, or maybe it's a cultural thing...

I "got" 'Rudolf, the Red, loves rain, Dear'; 'Gladly the Cross-eyed Bear' and 'I left my heart in Sam Planks Disco'.

However, I'm not familiar with 'Pardon me Roy is this the cat who chewed your new shoes?'.

I'd appreciate it if someone would explain that play on words.

Thanks.