Big Paws Only Dog Forums

I am currently dealing with a dying kenmore canister vacuum (only 2 years old) and a 3 year old dyson (that decides to only work ok 1 out of 10 times I use it).  I have a 2 year old Bernese Mountain Dog and 3 short hair cats.  I need to find a decent vacuum that will last more than a few years.  I've thought about getting the Dyson Animal, but I have had really bad luck with my Dyson DC14.  Any suggestions???

At what age should I be switching Cooper to adult food?  Any ideas/suggestions?

Yesterday we took an hour drive and brought Cooper to play with our friend's Lab.  While in the area, we decided to first stop at Petco and pick up some food and a toy for Cooper.  Now, Cooper has never been in a store before, so I already knew the automatic doors were going to be an adventure.  To my surprise, he flew right through the doors without a care.  However, as soon as all four paws were on the tile floor he pretty much went spread eagle and flopped down.  Our poor Berner couldn't even stand up without sliding around like he was on ice.  I felt horrible.  Right away I figured it was probably the fur in between his pads (we have never trimmed it, because it has never bothered him).  So, Cooper (shaking and very timid) and I sat down on the floor of the entrance of Petco while my husband went to grab the food and toy.   Eventually Cooper got up enough courage and skated back over to the front door (we had attempted to pick him up, but he is now way too heavy for me to lift at 70lbs).  As soon as we were back outside, he was back to happy go lucky pup, running around, visiting people and dogs.   

As soon as we got to our friend's house we went inside (Cooper had never been in the house before)...we made it to the entry rug, but Cooper wouldn't budge, right off the mat was their kitchen laminate flooring that was flat and shiny.  He was scared to death of that floor.  After treat after treat and 3 big pushes, he finally made it onto the floor and was fine walking then.  But now I have a pup that is petrified of smooth tile flooring. 

We start obedience classes this Tuesday....I hope they can help me with his tile floor fear (and let's hope they don't have tile floor there!)

SO, I wanted to get advice from the knowledgable people on this site about Cooper consistent issue.  Since he was about 10 weeks old, we have noticed that his front legs shake from time to time.  We asked our vet about it and he said that he had no lameness in his joints, so it was probably just growing pains or him being nervous.  In the past month, his shaking has been happening a little more often.  When I touch his front legs and joints, he acts fine, it doesn't hurt him at all.  He only shakes when he is sitting/laying down/standing still (never while playing and running around).  Anyone have any similiar experiences or idea if this is just growing pains...or could it be Pano? 

At what age does a berner usually start teething?  Cooper just lost his first tooth yesterday (exactly 4 months old).  I thought it was a little early for his to be loosing his sharp little puppy teeth.