I had an older dog that also slipped on my floors.

For floors, I bought large non slip runners. For stairs, I hated the clear plastic look as well as the strips. The best looking for me was carpet made for stairs.

Both did the trick. Sometimes humans must adjust.

SG

Problems getting up and down stairs and slipping can be signs of pain or neurologic disease. I suggest finding out what is bothering your dog and address his medical problems, if any. Otherwise SGs suggestions are really good.

IMHO a dog of that size that is falling on the stairs should be kept off of them. I can't tell you how many injuries I've seen from elderly dogs falling down the stairs. I know it can be hard if you have other dogs and are always running between the two floors of your house, but it is definitely the safest thing to do.

You might want to try a product by Bio-Groom called Show Foot. It is designed to keep show dogs from slipping on the floors in the ring and gives their feet a little extra grip. It can be effective with smaller dogs, but probably won't do much from your Dane. Worth a try though.

My big Dane Lab mix began having trouble getting up the stairs (carpeted) so I tried to escort him whenever possible. One day he took a tumble all the way down. It was so frightning to both of us. He laid at the foot of the stairs for a good half hour before he attempted to get up ( I was on the phone with the emergency vet). It ended up that he was fine, just scared and a little sore but I decided that I could not take the chance of this happening again, (what if it happened when I was not home and he was hurt)? The house is a split level ranch and luckily his yard was on the lower level. I blocked the stairs with a baby gate from then on. I could bring him around the yard and up the hill if he wanted to be upstairs. Please consider making those stairs off limits to your gal or at least where she cant go up or down without assistance. Puting a non skid treatment on them is not going to change the fact that she is no longer safe to attempt them herself.

I think meghane's suggestion is invaluable. You may decide after a vet visit that you don't want to risk stairs.

This may sound obvious, but if her nails are too long she could be losing her grip and slipping just from that.

We've had English mastiffs for over ten years and have had to block the hardwood stairs with a baby gate to stop the senior dogs from coming upstairs. Both dogs developed arthritis in their hips and we did not want to risk a fall.

Good luck, whatever you decide.