Injured dogs were left covered in blood, tethered with heavy chains and denied water by a Queensland man who has been jailed for dog fighting.

Animal welfare officials seized about 20 dogs from the Mount Cotton property of Jarrad Nathan Trenear in April last year as part of a sting on Queensland's underground dog-fighting web.

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They found flea-ridden American Staffordshire bull terriers, bull mastiffs, a pit bull terrier, a bulldog and an English mastiff chained in the dirt at the property south of Brisbane.

They had no bedding or clean water and some were bloodied and covered in scars consistent with dog fighting.