I do still try to mail birthday cards, especially to my daughters and grand children, because I can't be with them on their special day.
One of my daughters, LOVES dogs. She's even hospice fostered a dog during her final days to make sure her last days were comfortable.
So I usually send her a doggie card.
I found this pattern online but can't find the direct link, or I would share. Just research for a "Dog Pattern." I use Duck Duck Go. Pinterest makes it really hard to find the original link nowadays so you can pass on credit.
I was able to print the pattern to fit this card made from half sheet of card stock. The pattern was downsized to print on one quarter of the sheet to fit the front of the half sheet fold.
Check out her last card HERE.