Fortunately, the rabid squirrels were pink.

Unfortunately, they were really bright pink

Fortunately, they had both brown and black dye on hand.

Unfortunately, the dyes that were used are (very) harmful to living creatures.

Fortunately, a warg came and ate the squirrels, so they didn't need to worry about it.

Unfortunately, the warg died of the rabies that infected the squirrels.

Fortunately, it soon stopped raining gravy.

Unfortunately, a pack of sparrows ate the warg’s corpse and were then taken by the rabies leading them into bloodlust rampage, only to be made even worse by the raining gravy.

Fortunately, the gravy turned into snow.

Unfortunately, the snow was green so they weren't quite sure if it was snow at all.

Fortunately it turned out to be moss.

Unfortunately it was very cold.

fortunately they could sacrifice one of their own to make coats ;)

Unfortunately and predictably enough no one wanted to donate their skin and argued their case to Saruman

Fortunately, Saruman decided to supply them with tye-dye cloaks.

Unfortunately this was so he could direct his orcs to kill them.

Fortunately (for everyone except the orcs), the orcs got frostbite.

Unfortunately, the orcs liked frostbite.

Fortunately, their toes fell off so they couldn't attack anyone.

Unfortunately they had superglue to put their toes back on.

Fortunately they lost their hands next, followed by their tongues and then their eyes...but not the ears. The ears they would always keep to hear the shouts of everyone passing by...'Dear God what are those things!?" :p

Unfortunately, their clothes were brightly coloured and hurt the eyes of those passing by.

Fortunately, orcs can grow back any lost
appendages so they ran after, found, and ate
the sparrows.

Unfortunately with the sparrows extinct, this caused a giant hole to develop in Middle-earth's food chain and all life withered away. Who knew sparrows were that important to Middle-earth's ecosystem? :p

Fortunately Eru told Manwe to replace the sparrows
with ravens (which coincidentally explains their relative
scarcity in The Hobbit).

Unfortunately, Manwe was asleep at the time.

Fortunately, like all good wives, Varda Elenteri
covered for her negligent husband and took
care of that "sparrow/raven thing"- although
he did spend a few nights on their (granted rather
comfy) couch.

Unfortunately, Melkor got himself a new pet.

Fortunately it was a vegetarian alligator

Unfortunately, the veggie alligator ate the last fruit of Laurelin, so the Sun was never created.

Fortunately, it swelled up and floated in the sky, which turned it into a sort of sun anyway.

Unfortunately Melkor got sunburnt.

Fortunately it was only Melkor who got sunburnt.

Unfortunately, without a proper sun, the sunburns were not the primary worry of the first-born or the Maiar. The lacking of a sun was.

Fortunately, the vegetarian alligator who ate the fruit now glowed, and had somehow inflated and flew up into the sky, so now they had a green sun.

Unfortunately, this made Melkor's sunburnt skin turn green.

Fortunately, all his minions liked his new "Green" look.

Unfortunately, those who we're not his minions didn't.

Fortunately Melkor legally changed every inhabitant to minion status

Unfortunately Manwe had legal claims over everybody being Melkor's "minions" legally and filed a case. Feanor was his lawyer.