Five dogs? I do hope you'll be able to afford a villa with a large garden as there are few places you can exercise them. Sadly, Dubai is not really a dog friendly city. There are also now restrictions on certain breeds which are not allowed in public without muzzles. See this link.

Gulfnews: Dog walking ban is bone of contention for owners

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"Good advice is always certain to be ignored, but that's no reason not to give it." Agatha Christie