Complaints about the “physical environment” were among a catalogue of complaints from prisoners at Scotland’s open estate jail.
Inmates at Castle Huntly who are allowed regular unsupervised trips out in public also saw fit to complain about their home leave on almost 20 occasions within the last year, compared with just one prisoner at Perth.
A freedom of information probe showed the canteen at the low security facility between Dundee and Perth also sparked annoyance, as did work placements, education, clothing and wages.
The seemingly laidback lifestyle at Castle Huntly has often been attacked and earlier this year prison bosses were forced to defend a decision to take prisoners fly fishing.
Despite this, complaints were made about supervision levels, the prison regime and staff at the prison, which houses around 230 inmates.
The data from July 2014 to June this year revealed more than 7,500 complaints across the Scottish estate, including Perth where the 620-strong population made 318.
These included bullying, food, visits, victimisation, removal from associations and property.
With 1,434 complaints, HMP Grampian topped the national league despite having a population of just 420.
That compares to only 564 complaints at Scotland’s most populated jail, Barlinnie, which houses more than 1,200 at any given time.
There were 175 complaints at women-only jail Cornton Vale.
In reply to the information request the SPS stated that around 70% of all complaints are resolved at the time and a further 20% at the second stage in the process.
Those that remain unresolved can be forwarded to the Scottish Public Services Ombudsman (SPSO) for investigation, with their results published annually.
An SPS spokeswoman said the complaints system can be a valuable tool.
She said: “The process for handling prisoner complaints is set out in legislation. Our handling of complaints is subject to scrutiny by the Scottish Public Services Ombudsman as well as HM Inspector of Prisons.
“It’s right that people have the ability to complain and they can often help us identify shortcomings in the system.”