Bumblefoot can be caused by a bacterial infection (usually staphylococcus aureus) that gets into a leision or pressure-sore on the foot and causes an abscess.

Staph. aureus is present almost everywhere - and is usually benign, but if it gets somewhere that it shouldn't it can cause problems. Walking on a wire floor cage can aggravate the condition further but it seems that big, heavy chins are more prone.

It is common with guinea pigs, raptors and smaller cage birds.

The "bumbles" can bleed very heavily and if left untreated the infection may spead into the bone and/or bloodstream. The affected animal may also become anaemic due to the continued bloodloss.

Bumblefoot is extremely hard to treat once it becomes chronic.  Antibiotics, both systemic and topical are essential, together with a chlorhexidine solution wash for the feet (not at the same time as you apply the topical antibiotics).  I have found that purple spray is also a useful cleanser too.

The entire cage benefits from being cleaned daily, as it is important to keep the environmental bacterial count low.

Affected chinchillas should not be kept in an all-wire cage.  Cages should be furnished with soft bedding to give the chinchilla ample opportunities to get off the wire.  Soft bedding (such as pure wool, hessian-backed (NOT foam) carpet, clean cotton tea-towels or specially made cage-liners like the ones from "Hammocky Hammocks") can be tried to provide a soft resting surface to alleviate the pressure on the feet.  However, do ensure that your chinchilla does not eat the soft bedding!!

See this website for further details on soft cage-liners for chinchillas: http://www.hammockyhammocks.co.uk/

A good diet is also important.  Overweight chins can be encouraged to lose a little weight, by feeding a little less, and by feeding NO treats.

Anti-inflammatory pain killers, such as Metacam, can be administered to painful, chronic cases (see photo), but only your vet can prescribe this.

It is important to rigorously stick to the treatment regimen to ensure that the condition - at best, improves - or at worst, stops the bumbles from bleeding regularly.