Since everyone is making a guide, I'll do it too. Rat guides have been very requested, so I will make one with the knowledge I have 
If some rats do not have official names, I will post what I refer them to, feel free to use your own names
July/August08 Rats!
These were the first ever rats released that you could get on an account. These are very rare. Possibly rarer than the dogs as not many people like Rats, and so many weren't adopted. Here are all the rats you could get!
July08
---These did not come from the same newborn, but they are very alike in design.---
---(L-R)Ice/Icicle Rat, Lime Rat---
---These came from the same newborn, and are known as the pawprint rats---
---(L-R)Light Pawprint Rat, Dark Pawprint Rat---
---These rats came from the same newborn, and are known as the spotted rats---
---(L-R)Lightly spotted rat, Medium Spotted Rat, Heavily spotted rat---
---These Rats were the only outcome of their newborn, and they have no official names. ---
---(L-R)---Grey/Beige Rat, Brown/White Rat
August08 Rats
These have the same story as the July Rats, not many around, also very rare.
---These rats are known as the heart rats, they came from the same newborn---
---(L-R)Light Heart Rat, Dark Heart Rat---
---These came from different newborns, and are known by different names---
---(L-R)Skull/Pirate Rat, Grey Rat(?)---
September-Early November08
These rats were put up in september, but were avaliable 'til early November, so there are quite alot of them floating about.
All rats released!
---These rats are known as the panda/bubble rats. Came from the same newborn---
---(L-R)Pink, Blue, Orange Panda/Bubble Rat---
---These rats come from different newborns and the only one of the outcomes---
---(L-R)Leapord Rat, Tiger Rat, No Name---
November Rats
In November, a small amount of new rats were released. 3 to be precise. All equal in rareness. None of the rats had official names.
---These rats came from the same newborn, and have no official name. I refer to them as the biscuit rats XD---
---(L-R)Biscuit Rats---
---This rat has no official name, and is the lone outcome of the newborn---
---(L-R)Snowflake Rat---
Advent Released
In the advent calendar, The April-June08 rats were released. They also released some christmas rats as well
April08
These rats are a re-release of the account-less April08 pets
<-----This rat was known as the Raccoon Rat
<-----This Rat looks alot like the July08 Rat
---These ones do not have official names---
---(L-R)Grey/White Rat, Brown Spotted Rat, Brown Rat
<----- This one is known as the Albino rat, and there is a rat that looks like it, made in January
If some rats do not have official names, I will post what I refer them to, feel free to use your own namesJuly/August08 Rats!
These were the first ever rats released that you could get on an account. These are very rare. Possibly rarer than the dogs as not many people like Rats, and so many weren't adopted. Here are all the rats you could get!
July08
---These did not come from the same newborn, but they are very alike in design.---
---(L-R)Ice/Icicle Rat, Lime Rat---
---These came from the same newborn, and are known as the pawprint rats---
---(L-R)Light Pawprint Rat, Dark Pawprint Rat---
---These rats came from the same newborn, and are known as the spotted rats---
---(L-R)Lightly spotted rat, Medium Spotted Rat, Heavily spotted rat---
---These Rats were the only outcome of their newborn, and they have no official names. ---
---(L-R)---Grey/Beige Rat, Brown/White Rat
August08 Rats
These have the same story as the July Rats, not many around, also very rare.
---These rats are known as the heart rats, they came from the same newborn---
---(L-R)Light Heart Rat, Dark Heart Rat---
---These came from different newborns, and are known by different names---
---(L-R)Skull/Pirate Rat, Grey Rat(?)---
September-Early November08
These rats were put up in september, but were avaliable 'til early November, so there are quite alot of them floating about.
All rats released!
---These rats are known as the panda/bubble rats. Came from the same newborn---
---(L-R)Pink, Blue, Orange Panda/Bubble Rat---
---These rats come from different newborns and the only one of the outcomes---
---(L-R)Leapord Rat, Tiger Rat, No Name---
November Rats
In November, a small amount of new rats were released. 3 to be precise. All equal in rareness. None of the rats had official names.
---These rats came from the same newborn, and have no official name. I refer to them as the biscuit rats XD---
---(L-R)Biscuit Rats---
---This rat has no official name, and is the lone outcome of the newborn---
---(L-R)Snowflake Rat---
Advent Released
In the advent calendar, The April-June08 rats were released. They also released some christmas rats as well
April08
These rats are a re-release of the account-less April08 pets
<-----This rat was known as the Raccoon Rat<-----This Rat looks alot like the July08 Rat
---These ones do not have official names---
---(L-R)Grey/White Rat, Brown Spotted Rat, Brown Rat
<----- This one is known as the Albino rat, and there is a rat that looks like it, made in January
I've used the same picture!
