Anonymous flowers sent with weird card?

So I was just playing just Minecraft when my mum came in and had some flowers and I said " Oh they're nice, who sent them?" Long story short they was for me and look like £50 worth and yea I asked her was it her and she swore on her mum and dads grave it wasn't her. Anyway to the point, it came with a weird card which says " You kick my dog" I'm not sure if this is a cruel ( expensive ) joke, something random or I'm just missing out on a humorous joke. ( btw I'm pretty sure I haven't kicked mine or anyones dog so yeaa )

Any help would be great.

I don't know but I heard from somewhere,
"Kicking a/the dog" means something like dumping your girl friend?

I'm not sure but there's a viral vid of an Indian man complaining that some girl kicked his dog an it's all over the internet. Look it up "kick my dog" and it's kinda a funny meme. It could be a joke/prank.