I am using a XML file to replace words in my articles. Mostly it works fine but I have an issue I cannot solve:

-- XML
<item>
<search>cat</search>
<replace>little hairy something on four paws</replace>
</item>
<item>
<search>cat-flap</search>
<replace>door to heaven</replace>
</item>

-- Result
The quick brown cat is running... ==> The quick brown little hairy something on four paws is running... ==> OK
The cat-flap was broken ==> The little hairy something on four paws-flap was broken ==> not what I need

-- Settings
Use XML File = Yes
Regular Expressions = No
Treat as List = No
Word Search = Yes
Case sensitive = Yes
Maximum Replacements = Replace all
Thorough = No
Strip Wrapping Paragraphs = No
Replace with PHP = No

Is there something I can change, so it will work?

Best regards,
Florian