Help Hačiko with his operation

Hi! I’m 9 years old Beagle named Hači. 3 months ago I fell sick which resulted in my ganglion having to be removed. But during the operation we found out that my thyroid gland was enlarged. That slowly caused me to stop eating and drinking... and now without the costly and much needed operation to remove the gland I only have 1 month of life left. There’s a chance but without your help it will be hard to put the money together. I really don’t want to leave my big sister behind. We already are able to pay almost half of the price but we still need 300€.