Kari, Corgi medical bills

Kari is a seven (almost eight) year old Corgi. She's an active little girl who's hiked up mountains, loves swimming, and running around. She's also incredibly social and well behaved with other people and animals. She's a very cared for and loved dog, but recently Kari has been having health issues. She's losing her balance frequently, having small seizure like episodes and the vet is worried she might have a brain tumor. We've already spent about $900 in figuring out things that it's not, but to see if it's a tumor we need an MRI. Kari's not on our insurance so the quotes we're getting on the low end are $3,000. 

All of the money raised will be spent on Kari's medical bills, if we raise above the goal, the remaining amount will go towards her treatment which will likely be even more expensive if it's operable tumor. We're going to be doing everything we can to save our dogs life, and would greatly appreciate any help you can give. I always considered myself a cat person before I met and fell in love with this Dog. She's only seven and deserves a much longer life than this, please help us give her the chance to. Jill and I would be forever greatful.