Grief is completely natural, especially when it comes to a beloved family member. That’s what your dog is, right? 
Encourage your children to cry if they need to, and don’t be ashamed to do so yourself. If you’ve made the decision to euthanize your dog, your veterinarian may give you the option of going into the room and staying with your dog during her last few moments.
This is a decision that is completely up to you – some find it helpful and comforting to hold their pets during the procedure, others would rather remember their dog alive and happy.
Whether your dog is passing away naturally or by euthanization, there are a few steps you
can take to make things a little easier to handle for all involved. Plan “Doggie Days Out,” for
which you can set aside a date and take your pooch to a special place. It should be a day devoted entirely to her, so bring all of her favorite toys, treats, and go to her favorite park or nature trail. Take pictures of the whole family together, and let every family member have some special time alone with the pup. If possible, plan several of these and make sure they’re fun, festive occasions, not somber ones.
Think of all of her favorite activities and make sure she gets to do them at least one or two more times. If she always loved riding in the car with her head out the window but could no longer handle the hop into the front seat, have a friend or family member help you lift her into the car. Even if you just run a few short errands or drive aimlessly for 20 minutes, your dog will appreciate feeling like her old self.
She’s been an important member of your family, so try to make sure those last few weeks are as carefree and happy as possible. If she’s become crankier or less cuddly during her illness, encourage family members not to take any growls or lack of interest personally. She won’t understand what’s happening with her body and doesn’t mean to hurt her loved ones’ feelings. 
These are the last times you’ll get to play with her, so make them count. Let her
know exactly what she means to you and make that last hug and kiss the best she’s had in her life.