General Rules for Pet Owners in Spain
All domestic pets in Spain must be identified by microchip or by a clearly readable tattoo. The tattoo will only be accepted as a means of identification until 3 July 2011.
Vaccination against rabies is compulsory. It is also advisable to have dogs vaccinated against other diseases such as distemper and hardpad. Cats should be immunised against feline gastro enteritis and typhus.
There is no law against dogs fouling public places, however people are becoming increasingly sensitive about it and there are specific rules within certain places, such as urban parks.
Dogs should be kept on a lead in public places.
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Dangerous dogs
Any person owning a potentially dangerous dog (perros potencialmente peligrosos) in Spain must have an appropriate licence (by law of article 3 of the Royal Decree 287/2002, of 22 of March 2002) and the dog must be registered with the municipality. Handlers and walkers of dangerous or potentially dangerous dogs must also be licenced (article 1, 2 of Law 50/1999, of December 1999). A licence is valid for five years.
Potentially dangerous dog are identified as being in one of three categories:
1) Breeds and breed crosses classified as potentially dangerous:
Doberman (Andalucia only)
Pit Bull Terrier
Staffordshire Bull Terrier
American Staffordshire Terrier
Rottweiler
Dogo Argentino
Fila Brasileiro
Tosa Inu
Akita Inu
2) Dogs with certain characteristics of these breeds are also classified as potentially dangerous. The characteristics are:
Strong musculature, powerful or athletic constitution, robustness, agility, vigor and endurance
Short hair
Deep chest (60 to 80 cm), height of over 50 cm and a weight over 20 Kg
Big, square, head, with a wide skull and strong jaws
Broad, short and muscled neck.
Straight, parallel forelegs and muscular hindquarters, relatively long back legs standing at an angle
3) Dogs that have a track record of aggression to humans and other animals must also be licenced and registered.
Dog registration
Potentially dangerous dogs must be registered with the municipal registry for dangerous dogs (Registro Municipal de Perros Potencialmente Peligrosos). Registration of the dog must be renewed annually.
Take:
Proof of identification and microchip number's certificate
Certificate from the vet stating that the dog is in good health
Walking a potentially dangerous dog
Dog owners or handlers must carry the licence and dog registration document when out with the dog. The dog must be muzzled and on a lead of no more than two metres long (one metre in Andalucia). Only one dog may be handled per person. In Andalucia, dangerous animals are banned from entering children's leisure or recreational areas.
Taken from this link Essential Animal Information for Pets in Spain - AngloINFO Costa Blanca (Spain)




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my spanish is rubbish, might look for it in spanish when I get a minute. Nursing post op dog is all consuming at the minute.
Staffies are nice dogs if they´re well trained but I wouldn´t trust them not to snap at someone. Harry is a slightly different case. 

