any professional dog walkers?

You are a bit pricey Jamie – Glasgow walkers are around £7-£8 an hour mark.  My dog walker charges £12 for two hours (separate) because Nacho has been with him almost 5 years.  See if you can get an advert in the Country Club, Golf courses places where there wouldnt normally be an advert.  Local vets, local parks.  If there is a local newsletter.  Doctors surgery – put some leaflets in there, speak to receptionist, say you are available short term if clients are recovering from surgery etc.  Summer is quieter because of weather and school holidays (teachers etc dont need dog walkers during holidays).  Also if teenagers are in household during the summer they pick up the dog walking duties.  See if there are any behaviourists within say 15 miles that may do some work in your area and build up relationship with them also.  Once you are started word of mouth is best way.  I would get out a lot with your own dogs and always have your leaflets with you.  And always wear your tshirt or hoodie.  Give one to every dog owner you come across.  😉  Attach the leaflets with tie wraps to poo bins.    You might want to consider some other work whilst your business takes off  :-\  If there are any pet shops leaflet them too.  if not then go to where local people would get their supplies – erskine, inchinnan wherever you think and put leaflets in their windows. 
And then when you think you have exhausted all avenues.  Think some more…..  ;D  In the meantime get down to local rescue centres and ask about them giving leaflets to new owners  😉

I charge £4 for half an hour, £7 for an hour, as far as I’m aware I’m the cheapest around lol!  I already had connections in the doggy world up here when i started, they helped spread the word which was great.  I put leaflets in pet shops, groomers, and a couple of training/agility clubs put the leaflets in their puppy packs.  I didn’t do much leafleting to houses, simply because they cost money and the majority would have been binned.  I went to the popular dog walking areas wearing my uniform, and gave leaflets to people walking their dogs.

One of the best things i did was get on google.  Its free to register your business and if someone searches for dog walking in your area, your details would come up on the map.  You can also see how many people have clicked through to your website.  Try and register your details on as many free sites as possible, i don’t pay for any advertising!

Word of mouth is the most important thing, i got so many customers from one great lady who told everyone about me!

I think generally that people’s expectations are too high: it is very difficult to make dog walking into a full time job.  Extra pocket money, yes.  I have looked further about this on http://www.followthelead.org.uk.