We haven't been able to take payment
You must update your payment details via My Account or by clicking update payment details to keep your subscription.
Act now to keep your subscription
We've tried to contact you several times as we haven't been able to take payment. You must update your payment details via My Account or by clicking update payment details to keep your subscription.
Your subscription is due to terminate
We've tried to contact you several times as we haven't been able to take payment. You must update your payment details via My Account, otherwise your subscription will terminate.

Animal behaviour

Sir, Mr Stephen McKay (letter, August 26) states: “But there is no animal on earth that could begin to play a table tennis match.” The leading American behaviourist, B. F. Skinner, is reputed (amongst other things) to have taught a rabbit to pick up a coin in its mouth and drop it into a piggy bank, and a pig to vacuum.

In her book Opening Skinner’s Box (Bloomsbury, 2004), Lauren Slater speculates: “If he could train rats to press levers, why not train pigeons to, say, play ping-pong?”

Yours faithfully,

ALAN ROBINSON,

4 Mendip Lea Close, Draycott,

Cheddar, Somerset BS27 3SY.

August 27.